Which device continuously generates a supervisory signal at the Fire Alarm Control Panel (FACP)?

The device that continuously generates a supervisory signal at the Fire Alarm Control Panel (FACP) is the air pressure switch in a dry-type system. This switch monitors the air pressure within a dry pipe fire protection system, ensuring that the system is pressurized and ready to operate if a fire is detected. The supervisory signal it generates alerts the FACP that the system is functioning correctly or indicates if there is a problem, such as a drop in pressure that could render the system ineffective when needed.

The air pressure switch is crucial for maintaining the integrity and reliability of the fire protection system. In a dry pipe system, this is particularly important because the pipes are filled with pressurized air rather than water, so any loss of pressure can indicate a leak or malfunction that must be addressed to ensure safety.

Other devices listed do not generate a continuous supervisory signal to the FACP. For instance, smoke and heat detectors send signals only when detecting their respective conditions (smoke or high temperature), while a control module is designed to interface between devices and the FACP rather than generating supervisory signals independently.